Quantitative measurements of pressure gradients for the pyrophyllite and magnesium oxide pressure-transmitting mediums to 8 GPa in a large-volume cubic cell
Quantitative measurements of pressure gradients for the pyrophyllite and magnesium oxide pressure-transmitting mediums to 8 GPa in a large-volume cubic cell
复制标题
DOI：
10.1080/08957959.2011.614238
复制
发表时间：
2011-12
影响因子：
2
通讯作者：
Haikuo Wang;D. He;Xiaozhi Yan;Chao Xu;Junwei Guan;N. Tan;Wendan Wang
中科院分区：
文献类型：
--
作者：
Haikuo Wang;D. He;Xiaozhi Yan;Chao Xu;Junwei Guan;N. Tan;Wendan Wang
用大体积立方体装置定量测量了叶蜡石和氧化镁传压介质中的压力梯度。建立了叶蜡石和氧化镁立方在室温下沿对称轴的压力梯度与相应的晶胞压力之间的关系。我们的实验结果表明，压力梯度随着晶胞压力的增加而增大，在相同晶胞压力下，氧化镁传压介质中的压力梯度约为叶蜡石传压介质中的两倍。当晶胞压力达到5.5 GPa时，叶蜡石立方体沿对称轴的压力梯度约为50 Mpa/mm。当晶胞压力达到7.7 GPa时，氧化镁立方体沿对称轴的压力梯度约为140 Mpa/mm。本文得到的实验数据不仅适用于立方体压力机，也为四面体压力机和双级多压机(八面体压力机)提供了参考。
Quantitative measurements of pressure gradients have been made in the pyrophyllite and magnesium oxide (MgO) pressure-transmitting mediums using large-volume cubic apparatus. The relationships of pressure gradients along the axis of symmetry of the pyrophyllite and MgO cubes versus corresponding cell pressures have been established at room temperature. Our experimental results indicated that the pressure gradients increase as the cell pressure increases and that the pressure gradient in the MgO pressure-transmitting medium is about twice as high as that in the pyrophyllite pressure-transmitting medium at the same cell pressure. When the cell pressure reaches 5.5 GPa, the pressure gradient along the axis of symmetry of the pyrophyllite cube is about 50 MPa/mm. When the cell pressure reaches 7.7 GPa, the pressure gradient along the axis of symmetry of the MgO cube is about 140 MPa/mm. The experimental data obtained in the present work not only adapt to the cubic apparatus but also provide reference for the tetrahedral press and the double-stage multi-anvil apparatus (the octahedral compression).